This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A104819 #8 Mar 31 2012 10:24:25
%S A104819 314,15926,53,5897,932,38462,643,38,327950,28,84197,1693,9,937510,
%T A104819 5820974,94,4592307816,40628,62089,9862,8034,82534,21,1706,798214,80,
%U A104819 865132,82306,6470938,4,46095,50,582,2317,253,5940812,84,81,1,1745028
%N A104819 Numbers with distinct digits appearing in partition of decimal expansion of Pi.
%C A104819 Start with decimal expansion of Pi: 3,1,4,1,5,9,2,6,5,3,5,8,9,7,9,3,2,3,8,4,6,2,6,4,3... Part the sequence to the sections with distinct digits: s={3,1,4},{1,5,9,2,6},{5,3},{5,8,9,7},{9,3,2},{3,8,4,6,2},{6,4,3},... Then A104819(n) = number from digits of s(n): 314,15926,53,5897,932,38462,643,... Leading zero allowed as at first in a(42)= 193852 from {0,1,9,3,8,5,2}.
%Y A104819 Cf. A104807, A104820.
%K A104819 nonn,base
%O A104819 1,1
%A A104819 _Zak Seidov_, Mar 27 2005
%E A104819 Comment from _Jani Melik_, Nov 13 2009